Question

Show that a roller coaster with a circular vertical loop.
Thedifference in your apparent weight at the top of the circular
loopand the bottom of the circular loop is 6 g's-that is, six
timesyour weight. Ignore friction. Show also that as long as your
speedis above the minimum needed, this answer doesn't depend on the
sizeof the loop or how fast your go through it.

So far, the only thing I have is that the minimum speed to pass
theloop is.